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MK41T56S00TR Datasheet(PDF) 1 Page - STMicroelectronics |
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MK41T56S00TR Datasheet(HTML) 1 Page - STMicroelectronics |
1 / 15 page MK41T56 MKI41T56 512 bit (64b x8) Serial Access TIMEKEEPER ® SRAM March 1999 1/15 COUNTERS for SECONDS, MINUTES, HOURS, DAY, DATE, MONTH and YEARS SOFTWARE CLOCK CALIBRATION AUTOMATIC POWER-FAIL DETECT and SWITCH CIRCUITRY I 2C BUS COMPATIBLE 56 BYTES of GENERAL PURPOSE RAM ULTRA-LOW BATTERY SUPPLY CURRENT of 500nA OPERATING TEMPERATURE: – MK41T56: 0 to 70 °C – MKI41T56: –40 to 85°C AUTOMATIC LEAP YEAR COMPENSATION DESCRIPTION The MK41T56 TIMEKEEPER® is a low power 512 bit static CMOS RAM organized as 64 words by 8 bits. A built-in 32.768 kHz oscillator (external crystal controlled) and the first 8 bytes of the RAM are used for the clock/calendar function and are configured in binary coded decimal (BCD) format. Addresses and data are transferred serially via a two-line bi-directional bus. The built-in address register is incremented automatically after each write or read data byte. The MK41T56 clock has a built-in power sense circuit which detects power failures and automatically switches to the battery supply during power failures. The energy needed to sustain the RAM and clock operations can be supplied from a small lithium button cell. AI02304 OSCI VCC MK41T56 MKI41T56 VSS SCL OSCO SDA FT/OUT VBAT Figure 1. Logic Diagram OSCI Oscillator Input OCSO Oscillator Output FT/OUT Frequency Test / Output Driver (Open Drain) SDA Serial Data Address Input / Output SCL Serial Clock VBAT Battery Supply Voltage VCC Supply Voltage VSS Ground Table 1. Signal Names 8 1 PSDIP8 (N) 0.4mm Frame 8 1 SO8 (S) 150mil Width |
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